Zobrazeno 1 - 10
of 60
pro vyhledávání: '"Sikora, Szymon"'
Autor:
Sikora, Szymon, Ostrowski, Jan J.
Recently, we constructed the specific solution to the second-order cosmological perturbation theory, around any Friedmann-Lemaitre-Robertson-Walker (FLRW) background filled with dust matter and a positive cosmological constant. In this paper, we use
Externí odkaz:
http://arxiv.org/abs/2407.18007
Autor:
Sikora, Szymon
In this paper, a specific solution to the second-order cosmological perturbation theory is given. Perturbations are performed around any FLRW spacetime filled with dust and with a positive cosmological constant. In particular, with a possibly non-van
Externí odkaz:
http://arxiv.org/abs/2207.08488
Autor:
Żołek-Tryznowska, Zuzanna, Jeznach, Arkadiusz, Bednarczyk, Ewa, Murawski, Tomasz, Piłczyńska, Katarzyna, Sikora, Szymon, Tryznowski, Mariusz
Publikováno v:
In Industrial Crops & Products August 2024 214
Publikováno v:
Phys. Rev. D 106, 124022 (2022)
We use a cosmological counterpart of the cylindrical Halilsoy solution to illustrate properties of cross-polarized standing gravitational waves.
Comment: 19 pages, 6 figures; improved version
Comment: 19 pages, 6 figures; improved version
Externí odkaz:
http://arxiv.org/abs/2106.05829
Autor:
Bednarczyk, Ewa, Sikora, Szymon, Kossobudzka-Górska, Aneta, Jankowski, Krzysztof, Hernandez-Rodriguez, Yunuhen
Publikováno v:
In Journal of Orthopaedic Reports March 2024 3(1)
Autor:
Sikora, Szymon, Głód, Krzysztof
We construct an approximate solution to the cosmological perturbation theory around Einstein-de Sitter background up to the fourth-order perturbations. This could be done with the help of the specific symmetry condition imposed on the metric, from wh
Externí odkaz:
http://arxiv.org/abs/2005.06385
Autor:
Sikora, Szymon, Głód, Krzysztof
Publikováno v:
Phys. Rev. D 99, 083521 (2019)
We constructed a simple cosmological model which approximates the Einstein-de Sitter background with periodically distributed dust inhomogeneities. By taking the metric as a power series up to the third order in some perturbative parameter $\lambda$,
Externí odkaz:
http://arxiv.org/abs/1811.06836
Publikováno v:
Advances in Science & Technology Research Journal; 2024, Vol. 18 Issue 5, p90-100, 11p
Autor:
Sikora, Szymon, Głód, Krzysztof
Publikováno v:
Phys. Rev. D 95, 063517 (2017)
In this article, we present an example of an inhomogeneous cosmological model, which is inspired by the linear perturbation theory. The metric of this model can be described as the Einstein-de Sitter background with a periodically distributed dust ov
Externí odkaz:
http://arxiv.org/abs/1612.03604
Observations suggest a slower stellar rotation relative to gas rotation in the outer part of the Milky Way Galaxy. This difference could be attributed to an interaction with the interstellar magnetic field. In a simple model, fields of order 10 micro
Externí odkaz:
http://arxiv.org/abs/1610.07544